Chusetts



Dec. 22, 1925- J. A. BLAKE RAISED PRINTING APPARATUS Filed July 22, 1924 2 Sheets-Sheet 1 I N m: Q

M9 l y` l l j l J. A. BLAKE f l u HAllSED PRINTING APPRATUS Filed July 22, 1924 2 Sheets-Sheet 2 www@ @CML L7MM-W-W1LM* Patented Dec. 22, 1925.

UNITED STATESV 1,566,643 PATENT OFFICE.

JAMES A. BLAKE, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO RAISED `PROCESS MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION 0F MASSA- cHUsETTs.

BAISEDeE'RINTING APPARATUS.

' and useful Improvement in Raised-Printing Apparatus` of which the following is a speci tication, reference being had therein to the accompanying drawings.

The invention relates to an improvement in apparatus for producingraised printingV having an appearance somewhat like embossing and engraving by first printing the design or other matter upon the sheet, card or other article with ink or other suitable substance and then while the printing substance is still in green state dusting thereon a fusible powder, then passing the article through a suitable heating device to cause the powder to. melt and to amalgamate with the heating substance, then cooling and drying it so as to harden it.

The present invention relates especially to the oven through which the printed article is caused to travel for the purpose of amalgamating the printing substance and the fusible substance. One drawback to the apparatus heretoforeused for this purpose has been the difliculty of getting a proper amount of oxygen for the gas burner without undue loss of heat.

One object of the present'invention is to construct the oven in such a manner as to provide an ample supply of oxygen and yet conserve the heat. `Another object is to construct the apparatus so as to obtain the above mentioned conservation of heaty and proper amount of oxygen and at the same time have the apparatus in compact form. v

The invention will be fully understood from the following description when taken in connection with the accompanying draw ings, and the novel features thereof will be pointed out and clearly defined in the claims at the close of this specification.

In the drawings:

Fig. 1 is a view in elevation of the apparatus embodying the invention, the machine being partly broken away to simplify the illustration.

Fig. 2 is a plan view of the apparatus shown in Fig. 1.

Fig. .3 is a' ,section taken on -line g-f-B,

Fig. 4 is a section taken on line 4 4,

F ig. 3.

eferring now to the drawings:

There is shown at 10 an outer casing havlng an oven in the form of an inverted box which is open at the` bottoml and closed at the top, sides and en'ds, the lower edge of each end member having a passway 11 for the passage` of the upper run of the carrier 12. The said casing vis mountedkon suitable supports. As shown in the drawings, it is supported as follows: The lower edges of the side walls of the casing are each formed with an inturned flange 13 whichfrests on the upper, horizontal flange 15 of a plurality of angle plates 14 whose vertical portions are bolted to the upright flanges 16 of the angle bars 17 which extend lengthwise of the casing and are supported by the frame of the machine having legs 18. Preferably the casing 10 is made of `sheet metal having of heat.

A .bottoml plate member 2.3V isrprovided I which I term a reflector extending across the lower part of the outer casing and mounted on angle plates 24 which rest on the flanges 1'?y at a short distance below the open bottom of the casing-10. This reiiector is of someV what less yarea. than the cross se'ctionaldi-v mensions of the casing .so that'there is a marginal open` space 25.

An inner casing or oven 26 is provided having top, side and end walls butopen at the bottom. This inner casing is preferably supported, as shown', by brackets consisting of angle plates 28 having flanges which are respectively bolted or` otherwise fastened to the upright side walls of the inner and outer casings. The said inner casing. or oven 1s preferably made of sheet metal and formed with inturned iianges 31 around its lower edge although the anges are not essential.

The horizontal bottom flanges 13 of the outer casing are formed with a series of apertures 29 and the top of the inner casing is formed with a plurality of apertures 30 so that there is free circulation of air through the apertures 29 inY the bottom inner casing and the partition member-2l of the outervcasing, thence down` through the air spaces between thevsivdes of rthe-inner and' outer casing andv out throughfthe aperturesvQS). It isimmaterial whether the air currents follow the courseabove'described orfollow some other course, the essential feature being that there shall be .free circu-v lation of air romroutside into the oven and thence `to they space between the top walls of thetinner lcasing and the outer .casing yand thence'tothe outerair again.kr f

The conveyor 12 iiorlthe printed sheets or.

cards or other, articles runslongitudinally through the lower part ofthe outerfvcasingfk l0 and beneath the oven or inner casing 26. This. conveyor is4v vpreferably of wire meshfin the form of an endlesstraveler, the upperl `run of whichI passes through the entrance and exit; passages ll, 1l; atY the, two ends .ot

the 'outer casing. The conveyor runs over suitable'grolls- 33 84 at the endsot'the vmaehinepsaid rolls-being drivenfby anyisuitable mechanism. As shown inV the drawings, the forward .roll34ris drivenfbythe motor 36' by means otl intermediate mechanism consisting of a worm 37 on 'the motor yshaft 38,"worm gear-'39 onthe. sha-tt 40. which carriesabevelgearll and Ya bevel gear 42 on the shaft 44 which carries the roll 34. Any other suitable driving vmeans InaylVV be eine. ployed. j

Asuitable heating means is mounted with,- in the Ainner casing 26.V In thetform show-n in the .drawings the'heating medium vconsists of a gas burner 45 having at one. end a lug 46 which is'mounted inl one of theend walls of the inner casing 26' and l having at its other endl a tubularv extension 47 which passes through the. opposite end Ywall of the, inner casing-and through the end wall of the outer casing.-V The ysaidtubularextension 47 isy connected with a suitable gas supply .pipe having aA valve 48 tol control the admission ofy gas toqthe burner.v The :burner` Y is vprovided with burner orilices 49,'preferably-in its undersideso that the flame will be projected downward and throw thehe-at against thefupper runof the conveyor 12 and the printed sheets ofcards rifding. on the upper sideof the carrier.A Y

The cards, are printed by any' suitable mechanism and while`,the inl; isV fstill green they should be dusted with a suitable fusible powder which will adhere to the moist and sticky ink, and the surplus' powder removed by sha-king or blowing it off, then the printed and dusted articles are placed on a part o' the conveyor which is about to enter -the oven casing. rlhe speed of the conveyor and the degree of heat should be so regulated that the fusible substance will be fused during thetravel through the oven and the articles may be removedat the outlet end in any suitable manner. As shown in the draw-1 ings there is provided. a chute 5l ontoV which the articles drop from the carrier when it makes theturn after going over the roller 34.V

Cil

Thereflector 23 which is below the upper run of they conveyor will .check .the escape ofthe heated air through thek open bottom of the oven on the under side of theretic-t ulated carrier, and will also act as a reflector torei'lect it upwardly.

By reason of itsventilated inner casing 26,. sutiicient draft and oxygen are provided` to keep the flame alive and produce the necessary heat, and the closed top andsides of the. outery casing prevent the unnecessary escape of the heat, thus. conserving theh'eat. Moreover, the apparatus. may be very com-A pact as the requisite heat may be obtained in a very short oven'.

That l. claim is:

l. In an apparatus for producing raised printing-, two hollowA casings, one surroundingthe other, each having a top and sides and an .open bottom,y said casings being spaced to torni an air space between their walls at the. top and sides, a heating mediun'i in the inner casing, the topwall ofthe inner casing; being provided with. air ports` ,to permit the heated airjto pass from they in erior of the inner casinginto, the space etween the top walls of the two*v casings, and thence down betweenthe adjacent side walls of ythetwo casings to the outside air,`

and a conveyorr lfor t-he printed v`-aiticles .wh-ich'travels through the lower pant of the outer casing.

a. Int-an apparatusror producing raised printing two hollow casings, one surrounding the other,each having a top and sides and an open bottom, said casingsjbeing spaced to form an air space between their walls at the top and sides, a .heating medium in theinner casing, the top'wall of the inner mit the heated air to pass from theuinterior of vthe inner; casing into the space between the walls ofthe two casings, and Ythence down between the adjacent side walls of the two casings to the outside air, anda conveyor for thelprinted; articles which travels through the lower part of the outer casing beneath the heating medi-um. e

3, In an apparatus for producing raised printing, an inner casing having a top, sides Vin:

iesl

casing being provided with airports to perle() and an open bottom, a heating medium mounted therein, an outer casing surrounding the top and sides of said inner casing, and having sides, a closed top and an open bottom, said casings being spaced to form ali-spaces between their walls, the topwall of the inner casing being formed with air portstov permit the heated air to pass from the interior'of the inner casing into the top space between the casings, and t-hence downv through the space between the side walls of the two casings to the outside air, a conveyor for the printed articles which travels through the lower vpart of the casings and a heat reflecting member below the path traversed bythe articles carried by the conveyor.

Il. In an apparatus for producing raised printing, an oven having an open bottom, a heating medium mounted therein, a casing surrounding the top and sides of saidoven, and having an open bottom, said oven and casing being spaced to form air spaces between their walls at top and sides, the open bottoms of the oven and casing providing communication from the outer air into the oven, the J@op wall of the oven being formed with a plurality of apertures which provide passages for the heated air from the oven into the air space between the top of the oven and casing and thence into the spaces between t-he side walls of the oven and casing, a conveyor for the printed articles which travels through the lower part of the asing and a heat reflecting member below the path traversed by the articles carried by the conveyor, said reflector partially closing the bottom-ot' the oven in such manner as to leave air passages around the sides of. said renector into the oven and into the space between the oven and the casing.

In an apparatus for producing raised printing, an oven having an open bottom, a

heating medium mounted therein, a casing surrounding the top and sides of said oven, and having an open bottom, said oven and casing being spaced t'o form air spaces between their walls at top and sides, the open bottoms of the oven and casing providing communication from the .outer air into the oven, the top wall of the oven being formed with a plu `ality of apertures which provide passages for the heated air from the oven .into the airv space between the top of the oven and casing and thence into the spaces between the side walls of the oven and casing, a. conveyor for the printed articles which travels through the lower part of the casing and a heat reflecting member below the path traversed by the articles carried by the conveyor, said reflector partially closing the bottom of the oven in such manner as to leave air passagesaround the sides of said reflector into the .oven and into the space .between .the oven and the Casing, said heating medium being constructed and arranged to direct the heat downward toward the conveyor'.

6. In an -apparatus 'forproducing raised printing, an inner casing lhaving a. gtop, sides and an open bottom, a heating medium Vmounted therein, an outer casing surroundcasing extending down below the inner casing, each side wall of said outer casing having an inwardly extending. Lflange at its lower part formed withy apertures for the passage of air and a conveyor for the printed articles which travels through the lower part of the casing beneath the heating medium.

7 In an apparatus for producing raised printing, an inner casing having a top, sides \and an open bottom, a heating medium mounted therein, an outer casing surrounding the top and sides of sail inner casing and having a closed top an open bottom, said casings being spaced to form air spaces between their walls at the top and sides, the topwall of the inner casing being formed with air ports to permit the heated air t0 pass from the interior of the inner casing into-the top space between the two casings and thence down through the space between the side walls of the two casings, the outer casing extending down belowv the inner casing. each side wall of said outer' casing having an inwardly extending flange at its lower part formed with apertures for the passage of air, a conveyor for the printed articles which travels through the lower part of the casing beneath the heating medium, and a heat reflecting .plate in the lower part of the outer casing beneath that portion of the conveyor which carries the printed articles, said heat reflecting plate being of smaller dimension than said outer casing whereby passages are left around the margin of said reflecting plate.

8. In an apparatus for producing raised printing, an inner casing and an enclosing casing each having a closed top and sides and being open at the bottom, said casings being spaced to form air spaces between their walls at the top and sides, a heating medium within the inner casing, a conveyor for the articles which travelsk underneath the heating medium and is exposed to the heat therefrom and a heat reflecting'plate beneath the path of travel of the. articles on the conveyor, the casilgs constructed lll 5 the tops of the two casings whence it passes down through the space between the side walls, the outer casingv being formed with a outlety passages at the lower part thereof.

9.'In an apparat-us for producing raise-dV 10 printing, an inner casing and an enclosing casing each having a closed top and sides and being open atthe bottom, said casings beingv spaced to t'orni4 air spaces between their walls at the top and sides, a heating l5 inediunivcomprisinga gas burner within the 'inner casing, a conveyor for the articles which travels .underneath the heating, inedium, said gas burner having burner orifices which direct the larne downwardv toward the conveyor, and a heat reiiecting plate beneath thepath of travel of the articles on the conveyor, the vcasings being constructed to provide passages for the outside air from beneath up intothe inner casing, the topof' the inner casing having Voutlet ports for the heated air to` pass into the space between 'the tops of the two casings whence 'it passes down through the space between the side walls, the outer casinoI being formed with outlet passages at the Llower part thereof.

In testimony whereof I aiiix'my Signature.

JAMES lA. BLAKE. 

